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__pycache__	-	Open
base.py	2.39 MB	View DL Edit
cryptography.py	2.37 MB	View DL Edit
dsa.py	3.42 MB	View DL Edit
ecdsa.py	2.95 MB	View DL Edit
eddsa.py	1.87 MB	View DL Edit
rsa.py	3.47 MB	View DL Edit
__init__.py	4.18 MB	View DL Edit

Edit file: /lib/python3.9/site-packages/dns/dnssecalgs/eddsa.py

from typing import Type

from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric import ed448, ed25519

from dns.dnssecalgs.cryptography import CryptographyPrivateKey, CryptographyPublicKey
from dns.dnssectypes import Algorithm
from dns.rdtypes.ANY.DNSKEY import DNSKEY

class PublicEDDSA(CryptographyPublicKey):
    def verify(self, signature: bytes, data: bytes) -> None:
        self.key.verify(signature, data)

def encode_key_bytes(self) -> bytes:
        """Encode a public key per RFC 8080, section 3."""
        return self.key.public_bytes(
            encoding=serialization.Encoding.Raw, format=serialization.PublicFormat.Raw
        )

@classmethod
    def from_dnskey(cls, key: DNSKEY) -> "PublicEDDSA":
        cls._ensure_algorithm_key_combination(key)
        return cls(
            key=cls.key_cls.from_public_bytes(key.key),
        )

class PrivateEDDSA(CryptographyPrivateKey):
    public_cls: Type[PublicEDDSA]

def sign(self, data: bytes, verify: bool = False) -> bytes:
        """Sign using a private key per RFC 8080, section 4."""
        signature = self.key.sign(data)
        if verify:
            self.public_key().verify(signature, data)
        return signature

@classmethod
    def generate(cls) -> "PrivateEDDSA":
        return cls(key=cls.key_cls.generate())

class PublicED25519(PublicEDDSA):
    key: ed25519.Ed25519PublicKey
    key_cls = ed25519.Ed25519PublicKey
    algorithm = Algorithm.ED25519

class PrivateED25519(PrivateEDDSA):
    key: ed25519.Ed25519PrivateKey
    key_cls = ed25519.Ed25519PrivateKey
    public_cls = PublicED25519

class PublicED448(PublicEDDSA):
    key: ed448.Ed448PublicKey
    key_cls = ed448.Ed448PublicKey
    algorithm = Algorithm.ED448

class PrivateED448(PrivateEDDSA):
    key: ed448.Ed448PrivateKey
    key_cls = ed448.Ed448PrivateKey
    public_cls = PublicED448

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